Wang 300 Calc

Fred Cisin cisin at
Fri Sep 14 17:33:41 CDT 2007

On Fri, 14 Sep 2007, Tony Duell wrote:
> IIRC, the PS/2 mouse interface and PS/2 keyboard interface are very
> similar. Both are TTL level interfaces with clock and data lines, both
> have 4 signals on the connector (+5V, ground, clock, data), and the data
> transfer protocol is much the same.
> So why not use the same connector for the 2 interfaces?

Why, other than excessive stinginess did they switch to that, instead of
the REAL 5 pin DIN that even I can solder?

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